4270-libvirt-checkpoints.html

   1 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
   2 <link rel="stylesheet" href="style.css" type="text/css"/>
   3 <script src="code.js" type="text/javascript"></script>
   4
   5 <h1>Mixing backups with external snapshots</h1>
   6
   7 <ul>
   8   <li>managing disabled bitmaps in libvirt proved to be too complex</li>
   9   <li>each checkpoint creates a new bitmap, but all bitmaps are left active</li>
  10   <li>bitmaps are copied or merged alongside block job tasks</li></li>
  11 </ul>
  12
  13 <p>Block commit
  14   <table>
  15     <tr>
  16       <td style="vertical-align: top;">
  17         <p style="font-size:20px;">Base.qcow2</p>
  18         <table class="disk">
  19           <tr>
  20             <th style="visibility:hidden;">b0</th>
  21             <th>A</th><th>-</th><th>C</th><th>C</th>
  22             <th>B</th><th>B</th><th>D</th><th>-</th>
  23           </tr>
  24           <tr>
  25             <td style="font-style: italic;">b0</td>
  26             <td>-</td><td>-</td><td>X</td><td>X</td>
  27             <td>X</td><td>X</td><td>X</td><td>-</td>
  28           </tr>
  29           <tr>
  30             <td style="font-style: italic;">b1</td>
  31             <td>-</td><td>-</td><td>-</td><td>-</td>
  32             <td>-</td><td>-</td><td>X</td><td>-</td>
  33           </tr>
  34         </table>
  35       </td>
  36       <td style="vertical-align: top;">
  37         <p style="font-size:20px;">FullBackup.qcow2</p>
  38         <table class="disk">
  39           <tr>
  40             <th>A</th><th>-</th><th>A</th><th>A</th>
  41             <th>-</th><th>A</th><th>-</th><th>-</th>
  42           </tr>
  43         </table>
  44         <p style="font-size:20px;">IncBackup1.qcow2</p>
  45         <table class="disk">
  46           <tr>
  47             <th>-</th><th>-</th><th>C</th><th>C</th>
  48             <th>B</th><th>B</th><th>-</th><th>-</th>
  49           </tr>
  50         </table>
  51       </td>
  52     </tr>
  53   </table>
  54 </p>